Characterization of individual retained austenite grains and their stability in low-alloyed TRIP steels

E. Jimenez-Melero; N. H. van Dijk; L. Zhao; J. Sietsma; S. E. Offerman; J. P. Wright; S. van der Zwaag

doi:10.1016/j.actamat.2007.08.040

Characterization of individual retained austenite grains and their stability in low-alloyed TRIP steels

E. Jimenez-Melero^*, N. H. van Dijk, L. Zhao, J. Sietsma, S. E. Offerman, J. P. Wright, S. van der Zwaag

^*Corresponding author for this work

Metallurgy and Materials

Research output: Contribution to journal › Article › peer-review

Abstract

In situ three-dimensional (3-D) X-ray diffraction experiments have been performed at a synchrotron source on low-alloyed multiphase TRIP steels containing 0.25 wt.% Si and 0.44 wt.% Al and produced with different bainitic holding times, in order to assess the influence of the bainitic transformation on the thermal stability of individual austenite grains with respect to their martensitic transformation. A detailed characterization of the austenite grain volume distribution at room temperature was performed as a function of the prior bainitic holding time. In addition, the martensitic transformation behaviour of individual metastable grains was studied in situ during cooling to a temperature of 100 K. Both the carbon content and the grain volume play a key role in the stability of the austenite grains below 15 μm³, while the carbon content exerts the dominant effect in the stability of the bigger grains. Measurements also suggest that the tetragonality of the thermally formed martensite is suppressed.

Original language	English
Pages (from-to)	6713-6723
Number of pages	11
Journal	Acta Materialia
Volume	55
Issue number	20
DOIs	https://doi.org/10.1016/j.actamat.2007.08.040
Publication status	Published - Dec 2007

Bibliographical note

Funding Information:
We acknowledge the European Synchrotron Radiation Facility for provision of synchrotron radiation facilities and thank L. Margulies for assistance in using beam line ID11. This work was financially supported by the Netherlands Foundation for Fundamental Research on Matter (FOM) and the Netherlands Institute for Metals Research (NIMR).

Keywords

Martensitic phase transformation
Metastable phases
Polyphase microstructure
Synchrotron radiation
TRIP steels

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Polymers and Plastics
Metals and Alloys

Access to Document

10.1016/j.actamat.2007.08.040

Cite this

@article{5fb248e5d49d4217be20b28512df2e6b,

title = "Characterization of individual retained austenite grains and their stability in low-alloyed TRIP steels",

abstract = "In situ three-dimensional (3-D) X-ray diffraction experiments have been performed at a synchrotron source on low-alloyed multiphase TRIP steels containing 0.25 wt.% Si and 0.44 wt.% Al and produced with different bainitic holding times, in order to assess the influence of the bainitic transformation on the thermal stability of individual austenite grains with respect to their martensitic transformation. A detailed characterization of the austenite grain volume distribution at room temperature was performed as a function of the prior bainitic holding time. In addition, the martensitic transformation behaviour of individual metastable grains was studied in situ during cooling to a temperature of 100 K. Both the carbon content and the grain volume play a key role in the stability of the austenite grains below 15 μm3, while the carbon content exerts the dominant effect in the stability of the bigger grains. Measurements also suggest that the tetragonality of the thermally formed martensite is suppressed.",

keywords = "Martensitic phase transformation, Metastable phases, Polyphase microstructure, Synchrotron radiation, TRIP steels",

author = "E. Jimenez-Melero and {van Dijk}, {N. H.} and L. Zhao and J. Sietsma and Offerman, {S. E.} and Wright, {J. P.} and {van der Zwaag}, S.",

note = "Funding Information: We acknowledge the European Synchrotron Radiation Facility for provision of synchrotron radiation facilities and thank L. Margulies for assistance in using beam line ID11. This work was financially supported by the Netherlands Foundation for Fundamental Research on Matter (FOM) and the Netherlands Institute for Metals Research (NIMR).",

year = "2007",

month = dec,

doi = "10.1016/j.actamat.2007.08.040",

language = "English",

volume = "55",

pages = "6713--6723",

journal = "Acta Materialia",

issn = "1359-6454",

publisher = "Elsevier",

number = "20",

}

TY - JOUR

T1 - Characterization of individual retained austenite grains and their stability in low-alloyed TRIP steels

AU - Jimenez-Melero, E.

AU - van Dijk, N. H.

AU - Zhao, L.

AU - Sietsma, J.

AU - Offerman, S. E.

AU - Wright, J. P.

AU - van der Zwaag, S.

N1 - Funding Information: We acknowledge the European Synchrotron Radiation Facility for provision of synchrotron radiation facilities and thank L. Margulies for assistance in using beam line ID11. This work was financially supported by the Netherlands Foundation for Fundamental Research on Matter (FOM) and the Netherlands Institute for Metals Research (NIMR).

PY - 2007/12

Y1 - 2007/12

N2 - In situ three-dimensional (3-D) X-ray diffraction experiments have been performed at a synchrotron source on low-alloyed multiphase TRIP steels containing 0.25 wt.% Si and 0.44 wt.% Al and produced with different bainitic holding times, in order to assess the influence of the bainitic transformation on the thermal stability of individual austenite grains with respect to their martensitic transformation. A detailed characterization of the austenite grain volume distribution at room temperature was performed as a function of the prior bainitic holding time. In addition, the martensitic transformation behaviour of individual metastable grains was studied in situ during cooling to a temperature of 100 K. Both the carbon content and the grain volume play a key role in the stability of the austenite grains below 15 μm3, while the carbon content exerts the dominant effect in the stability of the bigger grains. Measurements also suggest that the tetragonality of the thermally formed martensite is suppressed.

AB - In situ three-dimensional (3-D) X-ray diffraction experiments have been performed at a synchrotron source on low-alloyed multiphase TRIP steels containing 0.25 wt.% Si and 0.44 wt.% Al and produced with different bainitic holding times, in order to assess the influence of the bainitic transformation on the thermal stability of individual austenite grains with respect to their martensitic transformation. A detailed characterization of the austenite grain volume distribution at room temperature was performed as a function of the prior bainitic holding time. In addition, the martensitic transformation behaviour of individual metastable grains was studied in situ during cooling to a temperature of 100 K. Both the carbon content and the grain volume play a key role in the stability of the austenite grains below 15 μm3, while the carbon content exerts the dominant effect in the stability of the bigger grains. Measurements also suggest that the tetragonality of the thermally formed martensite is suppressed.

KW - Martensitic phase transformation

KW - Metastable phases

KW - Polyphase microstructure

KW - Synchrotron radiation

KW - TRIP steels

UR - http://www.scopus.com/inward/record.url?scp=35748931158&partnerID=8YFLogxK

U2 - 10.1016/j.actamat.2007.08.040

DO - 10.1016/j.actamat.2007.08.040

M3 - Article

AN - SCOPUS:35748931158

SN - 1359-6454

VL - 55

SP - 6713

EP - 6723

JO - Acta Materialia

JF - Acta Materialia

IS - 20

ER -

Characterization of individual retained austenite grains and their stability in low-alloyed TRIP steels

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

Fingerprint

Cite this